Topic Knowledge Acquisition and Utilization for Machine Reading Comprehension in Social Media Domain Tian Zhixing author Zhang Yuanzhe author Liu Kang author Zhao Jun author 2021-08 text eng Proceedings of the 20th Chinese National Conference on Computational Linguistics Sheng Li editor Maosong Sun editor Yang Liu editor Hua Wu editor Kang Liu editor Wanxiang Che editor Shizhu He editor Gaoqi Rao editor Chinese Information Processing Society of China Huhhot, China conference publication zhixing-etal-2021-topic https://aclanthology.org/2021.ccl-1.88/ 2021-08 988 999